In a small baking dish or sheet pan, toss the asparagus, oil, minced garlic, salt, and pepper.
Transfer the asparagus to the basket of an air fryer. Depending on the size of your air fryer, you may need to work in batches as you want a single layer.
Set the temperature to 390°F (200°C) and cook for 4 to 5 minutes for thinner spears, and 6 to 8 minutes for thicker spears.
Before serving, add a squeeze of fresh lemon juice on top.
